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Testing ΛCDM versus Dynamical Dark Energy in 1 Yr: A DESI Spectroscopic Follow-up Program for Rubin Supernovae

  • Authors: Jannik Truong, Greg Aldering, Saul Perlmutter, David Rubin, David Schlegel

Jannik Truong et al 2026 The Astrophysical Journal 1009 .

  • Provider: AAS Journals

Caption: Figure 5.

Distance of BAO+CMB+Union3 best-fit from ΛCDM and FoM when adding SNe at two redshift bins (z1 and z2) with 10 mmag total uncertainty each to DESI DR2+Planck+Union3 and low-z SNe. Two measurements at medium redshifts z ≈ 0.6 and the combination of low-z and medium-z are considered optimal.

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